Post on 26-Mar-2020
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power Management
Maxim Integrated Products 1
General Description
The MAX4951C dual-channel buffer with input equaliza-tion and preemphasis is ideal to redrive internal serial-ATA (SATA) 1i, 2i, and 3i signals as well as eSATA 1m and 2m signals. The device features high electrostatic discharge (ESD) Q8kV Human Body Model (HBM) pro-tection. The device can be placed near a SATA connec-tor on the motherboard to overcome board losses and guarantee SATA compliance. The device is SATA speci-fication version 3.0 (gold standard) compliant and can also be pin-configured for SATA specification version 2.6 (gold standard) compliance.
The device features hardware SATA-drive cable detec-tion that automatically places the device into a standby mode that consumes less than 20FA (typ) standby cur-rent when no drive is connected. In addition, the device features an independent channel dynamic power-down mode where power consumption is reduced when no input signal is present. The device maintains output common-mode levels to meet internal SATA version 3.0 standards and prevent delays when coming out of low-power mode.
The device preserves signal integrity at the receiv er by reestablishing full output levels and reducing the total system jitter (TJ) by providing equalization. The device features channel-independent digital preemphasis con-trols to drive SATA outputs over longer trace lengths to meet internal SATA specifications. SATA out-of-band (OOB) signaling is supported using high-speed out-of-band signal detection on the inputs, and squelch on the corresponding outputs. Inputs and outputs are all internally 50I terminated and must be AC-coupled to the SATA controller IC and SATA device.
The device operates from a single +3.3V (typ) supply, is available in a small, 4mm x 4mm TQFN package with flow-through traces for ease of layout, and is specified over the commercial 0NC to +70NC operating temperature range. The MAX4951C is also pin compatible with the MAX4951BE SATA 6.0Gbps redriver.
Benefits and Features
S Unique Design Saves Power Low-Power, 20µA (typ) SATA Cable/Drive Detect Dynamic Power Reduction Reduced Power Consumption When Idle Maintains Common-Mode Output Level No Loss of Data When Coming Out of Low- Power Mode
S Allows Design Flexibility Single +3.3V Supply Operation SATA 3i (6.0Gbps) and SATA 2i/2m (3.0Gbps) Compliant SATA 1i/1m (1.5Gbps) Compatible
S Permits Longer Trace Lengths Input Equalization Selectable Output Preemphasis
S High Level of Integration for Performance Excellent Input/Output Return Loss Up to 6Gbps Supports SATA 2i and 3i Output Levels Supports SATA OOB Signaling OOB Detection: 3ns (typ) High ESD Protection on All Pins: ±8kV (HBM)
S Saves Board Space On-Chip 50I Input/Output Termination Resistors Inline Signal Traces for Flow-Through Layout Space-Saving, 4mm x 4mm TQFN Package with Exposed Pad Pin Compatible with the MAX4951BE
Applications
Laptop Computers
Servers
Desktop Computers
Docking Stations
Data Storage/Workstations
19-5815; Rev 0; 3/11
Ordering Information appears at end of data sheet.
For related parts and recommended products to use with this part, refer to: www.maxim-ic.com/MAX4951C.related
E V A L U A T I O N K I T A V A I L A B L E
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
Maxim Integrated Products 2
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power Management
(All voltages referenced to GND, unless otherwise noted.)VCC ...................................................................... -0.3V to +4.0VAINP, AINM, BINP, BINM, EN, CAD,
MODE, PA, PB (Note 1) ........................ -0.3V to (VCC + 0.3V)Short-Circuit Output Current
BOUTP, BOUTM, AOUTP, AOUTM .............................Q30mAContinuous Current at Inputs
AINP, AINM, BINP, BINM ..............................................Q5mA
Continuous Power Dissipation (TA = +70NC)TQFN (derate 25.6mW/NC above +70NC)................. 2051mW
Operating Temperature Range ............................ 0NC to +70NCStorage Temperature Range ........................... -55NC to +150NCLead Temperature (soldering, 10s) ................................+300NCSoldering Temperature (reflow) ......................................+260NC
TQFN Junction-to-Ambient Thermal Resistance (BJA) .......... 39NCW
Junction-to-Case Thermal Resistance (BJC) ................ 6NC/W
ABSOLUTE MAXIMUM RATINGS
Note 2: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maxim-ic.com/thermal-tutorial.
Note 1: All I/O pins are clamped by internal diodes.
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional opera-tion of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
PACKAGE THERMAL CHARACTERISTICS (Note 2)
ELECTRICAL CHARACTERISTICS(VCC = +3.0V to +3.6V, CCL = 10nF coupling capacitor on each output, RL = 50I, TA = 0NC to +70NC, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25NC.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Operating Power-Supply Range VCC 3.0 3.6 V
Operating Supply Current ICC
PA = PB = VCC, D10.2 pattern, f = 3GHz, active state
70 100
mAPA = PB = GND, D10.2 pattern, f = 3GHz, active state
60 85
Standby Supply Current ISTBY EN = GND or CAD = VCC 20 500 FA
Dynamic Power-Down Current IDYNPD 16 20 mA
Differential Input ResistanceZRX-DIFF-
DC(Note 4) 85 100 115 I
Differential Output ResistanceZTX-DIFF-
DC(Note 4) 85 100 115 I
AC PERFORMANCE
Differential Input Return Loss(Notes 4, 5)
RLRX-DIFF
150MHz P f < 300MHz 18
dB
300MHz P f < 600MHz 14
600MHz P f < 1200MHz 10
1.2GHz P f < 2.4GHz 8
2.4GHz P f ≤ 3.0GHz 3
Maxim Integrated Products 3
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementELECTRICAL CHARACTERISTICS (continued)(VCC = +3.0V to +3.6V, CCL = 10nF coupling capacitor on each output, RL = 50I, TA = 0NC to +70NC, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25NC.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Common-Mode Input Return Loss (Notes 4, 5)
RLRX-CM
150MHz P f < 300MHz 5
dB
300MHz P f < 600MHz 5
600MHz P f < 1200MHz 2
1.2GHz P f < 2.4GHz 2
2.4GHz P f ≤ 3.0GHz 2
Differential Output Return Loss (Notes 4, 5)
RLTX-DIFF
150MHz P f < 300MHz 14
dB
300MHz P f < 600MHz 8
600MHz P f < 1200MHz 6
1.2GHz P f < 2.4GHz 6
2.4GHz P f ≤ 3.0GHz 3
Common-Mode Output Return Loss (Notes 4, 5)
RLTX-CM
150MHz P f < 300MHz 8
dB
300MHz P f < 600MHz 5
600MHz P f < 1200MHz 2
1.2GHz P f < 2.4GHz 2
2.4GHz P f ≤ 3.0GHz 1
Differential Input Signal RangeVRX-DIFF-
PP
SATA 2i, SATA 3i, MODE = GND (Note 4) 240 1000mVP-P
SATA 2i, SATA 3i, MODE = VCC (Note 6) 220 1000
Differential Output SwingVTX-DIFF-
PP
f = 750MHz, f = 3.0GHz, PA = PB = GND (Notes 4, 6)
400 700 mVP-P
Output PreemphasisVTX-DIFF-
PP-PEf = 750MHz, PA = PB = VCC 3 dB
Input EqualizationVRX-DIFF-
PP-EQVRX-DFF-PP = 300mVP-P 2.7 dB
Preemphasis Time Period tPE f = 750MHz, PA = PB = VCC 150 ps
Propagation Delay tPD 240 ps
Output Rise/Fall TimetTX-RISE-
FALL
PA = PB = GND, CL = 0.5pF(Notes 5, 7)
40 ps
Deterministic Jitter (Notes 5, 8) tTX-DJ-DDData rate = 3.0Gbps, PA = PB = GND 17
psP-PData rate = 6.0Gbps, PA = PB = GND 20
Random Jitter tTX-RJ-DD PA = PB = GND (Notes 5, 8) 1.5 psRMS
OOB Detector Threshold VOOB_THSATA OOB pattern, MODE = GND (Note 4) 75 200
mVP-PSATA OOB pattern, MODE = VCC (Note 6) 50 150
OOB Output Enter/Exit Time tOOB (Note 9) 3 5 ns
OOB Differential Offset DeltaDVOOB-
DIFF(Note 10) -100 +100 mV
Maxim Integrated Products 4
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementELECTRICAL CHARACTERISTICS (continued)(VCC = +3.0V to +3.6V, CCL = 10nF coupling capacitor on each output, RL = 50I, TA = 0NC to +70NC, unless otherwise noted. Typical values are at VCC = +3.3V, TA = +25NC.) (Note 3)
Note 3: All devices are 100% production tested at TA = +70NC. Specifications over the operating temperature range are guaran-teed by design.
Note 4: This specification meets SATA version 3.0 (gold standard).Note 5: Guaranteed by design.Note 6: This specification meets SATA version 2.6 (gold standard).Note 7: Rise and fall times are measured using 20% and 80% levels.Note 8: DJ measured using K28.5 pattern; RJ measured using D10.2 patternNote 9: Total time for OOB detection circuit to enable/squelch the output.Note 10: Difference between squelched and not squelched in the active mode.Note 11: Difference between output common mode in the active and dynamic power-down state.
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
OOB Common-Mode Delta DVOOB-CM (Note 10) -50 +50 mV
OOB Output Disable VOOB-OUTVIN < VCCB (min), output voltage in squelch (Note 5)
30 mVP-P
Dynamic Power-Down Exit Time tDPD SATA OOB pattern 20 ns
Output Common-Mode Delta DVOUT-CM (Note 11) -25 +25 mV
LOGIC INPUT
Input Logic-High VIH EN, CAD, PA, PB, MODE 1.4 V
Input Logic-Low VIL EN, CAD, PA, PB, MODE 0.6 V
Input Logic Hysteresis VHYST EN, CAD, PA, PB, MODE 0.1 V
Input Pullup/Pulldown Resistance RPU-PD 370 kI
ESD PROTECTION
All Pins Human Body Model ±8 kV
Maxim Integrated Products 5
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementTypical Operating Characteristics
(VCC = +3.3V, TA = +25°C, all eye diagrams measured using K28.5 pattern, unless otherwise noted.)
VRX-DFF-PP = 240mVP-P, PA = VCC, DATA RATE = 6.0Gbps
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
MAX4951C toc09500mV
100ps50ps-100ps -50ps 0s-150ps 150ps
VRX-DFF-PP = 240mVP-P, PA = VCC, DATA RATE = 3.0Gbps
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
MAX4951C toc08500mV
200ps100ps-200ps -100ps 0s-300ps 300ps
VRX-DFF-PP = 240mVP-P, PA = VCC, DATA RATE = 1.5Gbps
400ps200ps-400ps -200ps 0s
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
-600ps 600ps
MAX4951C toc07500mV
VRX-DFF-PP = 1000mVP-P, PA = GND, DATA RATE = 6.0Gbps
100ps50ps-100ps -50ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
150ps 150ps
MAX4951C toc06
VRX-DFF-PP = 1000mVP-P, PA = GND, DATA RATE = 3.0Gbps
200ps100ps-200ps -100ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
-300ps 300ps
MAX4951C toc05
VRX-DFF-PP = 1000mVP-P, PA = GND, DATA RATE = 1.5Gbps
400ps200ps-400ps -200ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
-600ps 600ps
MAX4951C toc04
VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 6.0Gbps
100ps50ps-100ps -50ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
-150ps 150ps
MAX4951C toc03
VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 3.0Gbps
200ps100ps-200ps -100ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
-300ps 300ps
MAX4951C toc02
VRX-DFF-PP = 240mVP-P, PA = GND, DATA RATE = 1.5Gbps
400ps200ps-400ps -200ps 0s
-300mV
-200mV
-100mV
0V
100mV
200mV
300mV
-600ps 600ps
MAX4951C toc01
Maxim Integrated Products 6
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementTypical Operating Characteristics (continued)
(VCC = +3.3V, TA = +25°C, all eye diagrams measured using K28.5 pattern, unless otherwise noted.)
DIFFERENTIAL OUTPUT RETURN LOSS vs. FREQUENCY
MAX
4951
C to
c14
FREQUENCY (GHz)
DIFF
EREN
TIAL
RET
URN
LOSS
(dB)
2.52.01.51.00.5
-50
-40
-30
-20
-10
0
-600 3.0
MASK
MEASURED
DIFFERENTIAL INPUT RETURN LOSS vs. FREQUENCY
MAX
4951
C to
c13
FREQUENCY (GHz)
DIFF
EREN
TIAL
RET
URN
LOSS
(dB)
2.52.01.51.00.5
-50
-40
-30
-20
-10
0
-600 3.0
MASK
MEASURED
VRX-DFF-PP = 1000mVP-P, PA = VCC, DATA RATE = 6.0Gbps
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
MAX4951C toc12
100ps50ps-100ps -50ps 0s-150ps 150ps
VRX-DFF-PP = 1000mVP-P, PA = VCC, DATA RATE = 3.0Gbps
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
MAX4951C toc11500mV
200ps100ps-200ps -100ps 0s-300ps 300ps
VRX-DFF-PP = 1000mVP-P, PA = VCC, DATA RATE = 1.5Gbps
400ps200ps-400ps -200ps 0s
-500mV
-400mV
-300mV
0V
-100mV
-200mV
100mV
200mV
300mV
400mV
-600ps 600ps
MAX4951C toc10500mV
Maxim Integrated Products 7
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementPin Configuration
Pin Description
PIN NAME FUNCTION
1 AINP Noninverting Input, Channel A
2 AINM Inverting Input, Channel A
3, 13, 17
GND Ground
4 BOUTM Inverting Output, Channel B
5 BOUTP Noninverting Output, Channel B
6, 10, 16, 20
VCC
Positive Supply-Voltage Input. Bypass VCC to GND with 1FF and 0.01FF capacitors in parallel as close as possible to the device.
7 EN
Active-High Enable Input. Drive EN low to put the device in standby mode. Drive EN high for normal operation. EN has a 390kI (typ) pulldown resistor.
8 PB
Channel B Preemphasis-Enable Input. Drive PB high to enable channel B output preemphasis. Drive PB low for standard SATA output level. PB has a 390kI (typ) pulldown resistor.
PIN NAME FUNCTION
9 PA
Channel A Preemphasis-Enable Input. Drive PA high to enable channel A output preemphasis. Drive PA low for standard SATA output level. PA has a 390kI (typ) pulldown resistor.
11 BINP Noninverting Input, Channel B
12 BINM Inverting Input, Channel B
14 AOUTM Inverting Output, Channel A
15 AOUTP Noninverting Output, Channel A
18 CAD
Active-Low Cable-Detect Input. For external SATA applications, drive CAD high to put the device in standby mode. Drive CAD low for normal operation. CAD has a 390kI (typ) pullup resistor. For internal SATA applications, connect CAD to ground.
19 MODEOOB Threshold Level Set. MODE has a 390kI (typ) pulldown resistor.
— EP
Exposed Pad. Internally connected to GND. EP must be electrically connected to a ground plane for proper thermal and electrical operation.
19
20
18
17
7
6
8AI
NM
BOUT
P
9AI
NP
AOUT
M
BINM
BINP
AOUT
P
1 2
CAD
4 5
15 14 12 11
MODE
VCC
PA
PB
EN
VCC+GN
DGN
D
3
13
GND
16 10 VCCVCC
TQFN(4mm × 4mm)
MAX4951C
TOP VIEW
BOUT
M
*CONNECT EXPOSED PAD (EP) TO GND.
*EP
Maxim Integrated Products 8
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementFunctional Diagram/Truth Table
Detailed Description
The MAX4951C consists of two identical buffers that take SATA input signals and return them to full SATA compliant output levels. Each buffer includes an equalizer, a limiting amplifier, and an output driver with preemphasis. The buf-fer outputs are protected from high-voltage electrostatic discharge (ESD) to Q8kV Human Body Model (HBM).
Input/Output TerminationsInputs and outputs are internally 50I terminated and must be AC-coupled to the SATA controller IC and SATA device for proper operation.
OOB Signal DetectionThe device provides full OOB signal support through high-speed, OOB-detection circuitry. SATA OOB differ-ential input signals of VOOB_TH_LOW or less are detected as off and are not passed to the output. This prevents the
system from responding to unwanted noise. SATA OOB differential input signals of VOOB_TH_HIGH or more are detected as on and passed to the output. This allows OOB signals to transmit through the device. The time for the OOB detection circuit to detect an inactive SATA OOB input and squelch the associated output, or detect an active SATA OOB input and enable the output, is 3ns (typ). The MODE pin can be used to program the OOB detection range. When MODE = GND, the SATA version 3.0 range is used. When MODE = VCC, the SATA version 2.6 range is used.
Enable InputThe device features an active-high enable input (EN). EN has an internal pulldown resistor of 390kI (typ). Drive EN low or leave unconnected to place the device into low-power standby mode. In standby, the buffers are dis-abled, reducing the supply current to 20FA (typ). Drive EN high for normal operation.
50Ω50Ω
VCC VCC
VCC VCC
50Ω50Ω
50Ω50Ω50Ω50Ω
CONTROL LOGIC
AOUTPAINP
AOUTMAINM
BINMBOUTM
BINPBOUTP
GND MODE
VCC
MAX4951C
PA PB EN CAD
MODE VOOB_TH_LOW (mVP-P) VOOB_TH_HIGH (mVP-P)
0 75 200
1 50 150
EN
0
1
1
1
1
PA
X
0
1
0
1
PB
X
0
0
1
1
CHANNEL A CHANNEL B
STANDBY STANDBY
STANDARD SATA STANDARD SATA
PREEMPHASIS STANDARD SATA
STANDARD SATA PREEMPHASIS
PREEMPHASIS
EN CAD
PREEMPHASIS
STATUS
0 0 LOW-POWER STANDBY
0 1 LOW-POWER STANDBY
1 0 ACTIVE
1 1 LOW-POWER STANDBY
NOTE: PA, PB, EN, AND MODE HAVE A 390kI RESISTOR PULLDOWN TO GND.CAD HAS A 390kI RESISTOR PULLUP TO VCC.X = DON'T CARE.
Maxim Integrated Products 9
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementCable-Detect Input
The device features an active-low, cable-detect input (CAD) for use in external SATA applications. CAD has an internal 390kI (typ) pullup resistor. Drive CAD high or leave uncon nected to place the device into low-power standby mode. In this mode, the buffers are disabled, reducing supply current to 20FA (typ). This signal is normally driven low by inserting an internal SATA cable into a properly wired socket (see the Typical Operating Circuit). If the cable-detect feature is not desired, con-nect CAD to GND.
Dynamic Power-Down ModeThe device features a dynamic power-down mode where the device shuts down the major power consuming cir-cuitry. The device detects if the input signal is not present for a 4Fs (typ) duration. Normal operation resumes after 20ns (max) when a signal above the OOB threshold level is detected at the input. This function is implemented separately for both channels. The output common mode remains virtually unchanged when entering or exiting
dynamic power-down mode, making the device ideal for internal SATA applications.
Output Preemphasis Selection InputsThe device has two preemphasis control-logic inputs, PA and PB. PA and PB have internal 390kI (typ) pulldown resistors. PA and PB enable preemphasis to the out-puts of their corresponding buffers (see the Functional Diagram/Truth Table). Drive PA or PB low or leave unconnected for standard SATA output levels. Drive PA or PB high to provide preemphasis to the output. The preemphasis output signal compensates for attenua-tion from longer trace lengths or to meet internal SATA specifications.
Applications Information
Figure 1 shows a typical application with the device used to drive an internal SATA device. Set PB high and PA low for applications with board losses < 3dB between the MAX4951C and the connector.
Figure 1. Typical Application Circuit for Internal SATA Applications
SATA HOSTCONTROLLER
INTERNALSATA
DEVICECONNECTOR
HARD DRIVE/SOLID-STATE
DRIVE
Rx
1
5
6
7
2
3
Tx
10nF (X7R)
10nF (X7R)
AINP
AINM
BOUTM
BOUTP
AOUTP
AOUTM
BINM
BINP
CAD
Tx
Rx
10nF (X7R) 10nF (X7R)
10nF (X7R) 10nF (X7R)
10nF (X7R)
MAX4951C
4
10nF (X7R)
GNDPBPA
VCC
EN
GPIO
MODE
GPIO
+3.3V
0.01µF1µF
VCC
Maxim Integrated Products 10
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementExposed-Pad Package
The exposed-pad, 20-pin TQFN package incorporates features that provide a very low-thermal resistance path for heat removal from the device. The exposed pad on the device must be soldered to GND for proper ther mal and electrical performance. For more information on exposed-pad packages, refer to Application Note 862: HFAN-08.1: Thermal Considerations of QFN and Other Exposed-Paddle Packages.
LayoutUse controlled-impedance transmission lines to interface with the device’s high-speed inputs and outputs. Place power-supply decoupling capacitors as close as pos-sible to the VCC pin.
Power-Supply SequencingCaution: Do not exceed the absolute maximum rat-ings because stresses beyond the listed ratings can cause permanent damage to the device.
Proper power-supply sequencing is recommended for all devices. Always apply VCC before applying signals, especially if the signal is not current limited.
ESD ProtectionAs with all Maxim devices, ESD protection structures are incorporated on all pins to protect against electrostatic discharges encountered during handling and assembly. The MAX4951C is protected against ESD events up to Q8kV (HBM). The ESD struc tures withstand Q8kV in all states: normal operation and powered down. After an ESD event, the device continues to function without latchup.
HBMThe device is rated for Q8kV ESD pro tection using the HBM (MIL-STD-883, Method 3015). Figure 2 shows the HBM voltage, and Figure 3 shows the current waveform it generates when discharged into a low-impedance state. This model con sists of a 100pF capacitor charged to the ESD voltage of interest that is then discharged into the device through a 1.5kI resistor.
Figure 2. Human Body ESD Test Model Figure 3. Human Body Current Waveform
CHARGE-CURRENT-LIMIT RESISTOR
DISCHARGERESISTANCE
STORAGECAPACITOR
CS100pF
RC1MΩ
RD1.5kΩ
HIGH- VOLTAGE
DCSOURCE
DEVICEUNDERTEST
100%
36.8%
tRL
TIME
tDL
PEAK-TO-PEAK RINGING(NOT DRAWN TO SCALE)
Ir
00
IPEAK (AMPS)
90%
10%
Maxim Integrated Products 11
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power ManagementTypical Operating Circuit
Package Information
For the latest package outline information and land patterns (footprints), go to www.maxim-ic.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status.
Ordering Information
+Denotes a lead(Pb)-free/RoHS-compliant package.*EP = Exposed pad.
Chip Information
PROCESS: BiCMOS
PART TEMP RANGE PIN-PACKAGE
MAX4951CCTP+ 0NC to +70NC 20 TQFN-EP*
PACKAGE TYPE
PACKAGE CODE
OUTLINE NO.
LAND PATTERN NO.
20 TQFN-EP T2044+2 21-0139 90-0036
SATA HOSTCONTROLLER
eSATADEVICE
CONNECTOR
EXTERNALHARD DRIVE
Rx
1
5
6
7 OR 1*
*PINS 1 AND 7 CAN BE INTERCHANGED DEPENDING ON THE LAYOUT.
2
3
Tx
10nF (X7R)
10nF (X7R)
AINP
AINM
BOUTM
BOUTP
AOUTP
AOUTM
BINM
BINP
CAD
Tx
Rx
10nF (X7R) 10nF (X7R)
10nF (X7R) 10nF (X7R)
10nF (X7R)
MAX4951C
4
10nF (X7R)
GNDPBPA
VCC
EN
GPIO
MODE
GPIO
+3.3V
0.01µF1µF
VCC
MAX4951C6Gbps SATA Bidirectional Redriver with Input Equalization,
Preemphasis, and Advanced Power Management
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 12
© 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
Revision History
REVISIONNUMBER
REVISIONDATE
DESCRIPTIONPAGES
CHANGED
0 3/11 Initial release —